Added Iterable, a class that vends standard C++

iterators for LLDB's container data structures.
Iterable abstracts over the backing data structure,
ignoring keys for maps for example.  It also provides
locking as a service so that the code

for (ThreadSP thread_sp : process->Threads())
{
  // ... use thread_sp
}

takes the appropriate locks once, without having to
do anything else.

The salient advantages of this system are:

- Much simpler and idiomatic loop code
- Lock once instead of each time an element is fetched
- Less boilerplate to produce the iterators

The intent is that Iterable will replace Get...AtIndex
in most places, and that ForEach(), which solves the
same problem in a less-idiomatic way, be phased out in
favor of this approach.

I've added Iterables to ThreadList, TypeList, and
Process (which is really just forwarding to ThreadList).

llvm-svn: 194159

1 files changed, 6 insertions, 0 deletions

diff --git a/lldb/include/lldb/Target/Process.h b/lldb/include/lldb/Target/Process.h
index aa7b5edc5af..b55b8da1352 100644
--- a/lldb/include/lldb/Target/Process.h
+++ b/lldb/include/lldb/Target/Process.h
@@ -3305,6 +3305,12 @@ public:
         return m_thread_list;
     }
     
+    ThreadList::ThreadIterable
+    Threads ()
+    {
+        return m_thread_list.Threads();
+    }
+    
     uint32_t
     GetNextThreadIndexID (uint64_t thread_id);